National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decorah (KDEH)

Lat: 43.28°NLon: 91.73°WElev: 1158ft.

Mostly Cloudy

N/A

Humidity NA
Wind Speed Vrbl 5 mph
Barometer 29.97 in
Dewpoint N/A
Visibility 10.00 mi
Last update 2 Aug 12:15 pm CDT
Extended Forecast for

6 Miles NNE Castalia IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 79. Northeast wind 3 to 6 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the morning.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. South wind around 6 mph.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. South wind 5 to 7 mph becoming west in the afternoon.

    High: 79 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Light northwest wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 59 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 40 percent chance of showers. Partly sunny, with a high near 75. Calm wind.

    High: 75 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Partly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 78. Calm wind.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 79. Northeast wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 59. Calm wind.
Monday
Sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 62. South wind around 6 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. South wind 5 to 7 mph becoming west in the afternoon.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Light northwest wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 75. Calm wind.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 55. Calm wind.
Thursday
Mostly sunny, with a high near 78. Calm wind.
Thursday Night
Partly cloudy, with a low around 59. Calm wind.
Friday
Mostly sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62. Light south wind.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83. Southwest wind 3 to 6 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNE Castalia IA
 43.19°N 91.62°W
Last Update:
11:51 am CDT Aug 2, 2026
Forecast Valid:
12pm CDT Aug 2, 2026-6pm CDT Aug 8, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation